Omron STI CM Series User manual

DESCRIPTION
The CM Series safety system is a tamper resistant non-
contact safety switch system, suitable for use in most types
of machine guarding applications where guard locking is not
required. The system comprises of a control unit and 1 or
more safety switches and actuators. The CM Series non-
contact safety switches are easy to install, tolerant to
misalignment and suitable for use in harsh or wet
environments.
CM-S41 Control Unit
The CM-S41 is a combined Safety Switch and E-Stop control
unit. Along with the ability to monitor up to four CM Series
safety switches it can also monitor the normally closed
contacts of emergency stop buttons or mechanical safety
switches in dual channel control circuits.
The CM-S41 has 2 normally open safety contact outputs and
1 normally closed auxiliary output, an external re-set/proving
circuit and LED indication for ‘Power’, ‘Run’ and the status of
each activated gate switch.
CM-S21 Control Unit
The CM-S21 control unit is a 24V ac/dc system that can
monitor up to 2 CM Series safety switches.
The CM-S21 has 2 normally open safety contact outputs and
1 normally closed auxiliary output, an external re-set/proving
circuit and LED indication for ‘Power’, ‘Run’ and the status of
each activated gate switch.
CM-SE Extender Module
The CM-SE Extender module is a 24V ac/dc unit that can be
added to either the CM-S41 or CM-S21 to monitor an
additional 5 CM Series safety switches. Connection to the
main control unit is by a simple 2-wire bus connection. The
status of each guard switch is shown by the YELLOW LED’s.
Additional CMS-E extender modules can be added to
monitor larger systems.
Safety Switches
The CM Series safety switches are non-contact, tamper
resistant safety switches. Resin encapsulated into an ABS or
Stainless Steel case providing environmental protection to
IP67, the switches can withstand most conditions including:
water, dust and high pressure hose cleaning.
The 2-wire connection to each safety switch is
monitored by the control unit, detecting both open and
short circuit faults immediately and returning the control
unit to the off state even if the gate is not operated.
APPROVALS
CE Complies with the relevant sections of the CE
marking directive.
UL UL 508 Industrial Control Equipment
TUV Tested to EN954-1
EUROPEAN DIRECTIVES
Machinery Directive 98/37/EC
Low Voltage Directive 73/23/EC
Electromagnetic Compatibility Directive 89/336/EC
EUROPEAN STANDARDS
EN292 Safety of Machinery
Basic concepts, general principles for design.
EN 60204 Safety of Machinery
Electrical equipment of machines.
EN 954-1 Safety of Machinery
Safety related parts of controls systems
EN 1088 Interlocking devices associated with guards.
EN
60947-5-3
Safety of Machinery
Specification for low voltage switchgear and
control gear.
CERTIFICATE OF CONFORMITY
A certificate of conformity can be obtained from the OMRON
STI Web Site: WWW.STI.COM
This information is designed to help suitably qualified
personnel install and operate STI Safety Switch equipment.
Before using this product, read this guide thoroughly along
with any relevant European and/or National standards e.g.
Machinery Directive 89/392/EEC and it’s amendments,
Provision and Use of Work Equipment Regulations.
Further information can be obtained from
STI
***** KEEP THIS GUIDE FOR FUTURE REFERENCE *****
CAUTION
CM-S41 CM-S21 CM-SE
CM-S11 CM-S31
APPLICATIONS
Interlocked guards where door locking is not required.
Food and Beverage packing/filling systems;
Diary, Pharmaceutical, Paper Industry
Can Forming and Filling, (Aluminum, Steel, Plastic)
Semiconductor Manufacture/Assembly
Concrete Block Manufacture.
Operating Instructions for CM-S41, CM-S21, CM-SE, CM-S11, CMS31 CM Series Safety System
CM Series
Safety,
Technology
& Innovation

CM-S41 TERMINAL INFORMATION
TERMINAL
NUMBER DESCRIPTION
A1 ; A2 Power Supply
S13 ; S14 E-Stop / Mechanical Safety
Input—Channel 1
S23 ; S24 E-Stop / Mechanical Safety
Input—Channel 2
X1 ; X2 External Proving / Reset
BL ; DR - Gate
inputs 1 to 4 Guard Switch Inputs
13 ; 14 N/O Safety Contact 1
23 ; 24 N/O Safety Contact 2
31 ; 32 N/C Auxiliary Contact
31
X1
13
BL
23
DR
A2
32
X2
14
BL DR
24
POWER - RED
GATE 1 - YELLOW
GATE 2 - YELLOW
RUN - GREEN
GUARD
SELECTOR
SWITCH
RESET
SELECTOR
SWITCH
A1
GATE 1 INPUT
GATE 2 INPUT
CM-S21 TERMINAL INFORMATION
TERMINAL
NUMBER DESCRIPTION
A1 ; A2 Power Supply
X1 ; X2 External Proving / Reset
BL ; DR - Gate
inputs 1 & 2 Guard Switch Inputs
13 ; 14 N/O Safety Contact 1
23 ; 24 N/O Safety Contact 2
31 ; 32 N/C Auxiliary Contact
A1
DR
BL
DR
BL
DR
BL
A2
DR
BL
DR
BL BL
DR
POWER - RED
RESET
SELECTION
SWITCH
GATE STATUS
INDICATORS
(YELLOW)
GS5
GS4
GS3
GS2
BUS
GATE 2 INPUT
GATE 5 INPUT
GATE 1 INPUT
GATE 4 INPUT
GATE 3 INPUT
CM-SE TERMINAL INFORMATION
TERMINAL
NUMBER DESCRIPTION
A1 ; A2 Power Supply
BL ; DR - Gate
inputs 1 to 5 Guard Switch Inputs
BL ; DR - BUS Bus connection to main
control unit
This installation guide is to help trained personnel to install the CM-Series non-contact
safety switch system.
The CM-Series system is suitable for most types of machine guarding applications
where guard locking is not required. The safety switches can be fitted to sliding,
hinged or removable machine guards.
Comprising of a Safety Control Unit CM-S41/S21/SE and one or more Safety Switch
and Actuators, systems can easily be assembled to monitor 30+ machine guards while
retaining the high control category performance required in many applications. (CAT 3
according to EN954-1)
To assemble the system, mount the control unit in a suitably IP rated control panel
(Min IP54) and fix the safety switches to the gates as shown. Connect the safety
switches to the control unit. Using the appropriate selection table set the required
active gate inputs and reset options.
IMPORTANT :
Always check the correct operation of all the safety functions after installation
and periodically through the life of the system.
It is the responsibility of the user to ensure safe and proper use of any safety
PRODUCT IDENTIFICATION AND TERMINAL LAYOUT
234
S13 A1 S23 X1 BL BL DRDR 31 13 23
S14 A2 S24 X2 BL BL DRDR 32 14 24
GATE 3 GATE 4
RUN - GREEN
POWER - RED
GUARD
STATUS
YELLOW
GUARD SELECT
GREEN
GUARD
SELECTOR
SWITCH
G
ATE 1 INPUT
G
ATE 2 INPUT
GATE 3 INPUT GATE 4 INPUT
GATE 1 GATE 2
RESET SELECTOR
SWITCH
SYSTEM INSTALLATION
CM-Series
Control
Unit

INSTALLING THE CONTROL UNIT
The CM-Series control units are designed to fit standard 35mm symmetric
DIN rail.
TO FIT : Hook the unit onto the DIN rail (1) and gently push into place (2).
The catch should hold the unit securely in place.
TO REMOVE: Place the tip of a small screwdriver into the white catch at the
bottom of the box (1) and gently lever out. This releases the retaining clip
and allows the unit to be tilted (2) and removed (3).
OFFON
1
2
12
3
GUARD SELECTOR & RESET SWITCHES
The central part of the CM-Series control unit lid (1) is removable. Using a small screwdriver in the
recess (2) gently pry the lid upwards. This allows access to the Automatic/Manual monitored Reset
switch and the Guard Selector Switch.
Using the table next to the relevant control unit overleaf, set the CM-Series control unit to the
required number of guard switch inputs and type of reset required.
IMPORTANT:
The number of inputs (safety switches) must match the gate selector setting.
Any incorrect setting will stop the system from operating correctly.
1
2
INSTALLING THE SAFETY SWITCHES
The CM-Series safety switch sensors have 2 pre-drilled mounting holes and
are supplied with M4 x 20mm TORX Tamper Proof screws. (see page 7 for
dimension details)
The gate switches can approach each other from any angle (A), but must
end up with the arrows on the printed face pointing towards each other.
Mount the fixed part of the safety switch to the machine frame and the
actuator on to the opening edge of the door (B).
For the best results, mount the sensors with a gap of approximately 1mm.
when the guard is closed. This gives a high level of lateral tolerance to allow
for ‘gate sag’ and freedom from nuisance tripping due to machine / guard
vibration.
1) Always try to mount the safety switch on non-ferrous material.
Ferrous materials will reduce the switching distance.
2) Leave a minimum 50mm gap between actuators. (A)
3) Avoid mounting the safety switch on the hinged side of the
door, as this may allow the door to be opened too far before the
switch de-activates. (B)
EN 1088
provides some mounting suggestions, see example (C).
When fixing the switches to a sliding door, ensure that when the
door is opened the switch is not easily accessible.
CONNECTING SWITCHES TO THE CONTROL UNIT
The CM-Series safety switches are supplied with 3 or 5 metres of cable
encapsulated into the switch. This ensures a completely water-tight
connection at the switch.
Cables can be extended using the same type of screened cable.
Run the cable back to the control unit through cable protection (if required)
and terminate into the appropriate control unit input channel.
Follow the color coding of the wires to the labels on the control unit input
terminals. i.e. BLUE wire to BL and DRAIN wire to DR.
MAX. 100
m
BL
DR
ISIS
CONTRO
L
UNIT
ISIS
SAFETY
SWITCH
A
B
IMPORTANT: Use the GATE inputs in sequence. Examples:
One Guard System—Use input 1 on the CM-S21 ( Or input 1 on the CM-S41 if E-Stop function required);
Three Guard System—Use inputs 1, 2 & 3 on the CM-S41;
Seven Guard System—Use inputs 1,2 & 3 for Guard Switches on the CM-S41 and Input 4 to connect to the CM-SE Extender
module Bus connection. Then use inputs 1,2,3 & 4 on the CM-SE.
WRONG!
B
A
Min. 50m
m
C
Safety
Switch
MOUNTING THE SWITCHES
Control Unit

CM-S41 CONNECTIONS
CM-S41 RESET AND MONITORING
SWITCH
Reset
Switch
Position
Operation
Automatic Reset
Link required between
terminal X1 & X2. ISIS-4 will
reset when all active guards
are closed.
Manual / Monitored Reset
Requires a reset button in
the X1—X2 connection. The
system will reset when all
guards are closed and the
re-set button is pressed and
released. The reset button is
monitored for faults.
CM-S41 GUARD SELECTION SWITCH & INDICATION
Guard
Indication
(Yellow)
De-select
Indicator
(Green)
Channel
Selector
Switch
Operation
1 Gate Operation—Yellow LED No. 1 will
illuminate when gate switch 1 is closed.
All other Yellow gate indicators will remain
illuminated. No green LED’s illuminated.
2 Gate Operation—Yellow LED’s 1 & 2 will
illuminate when corresponding gate switch is
closed. All other Yellow gate indicators will remain
illuminated. Top green LED illuminated.
3 Gate Operation—Yellow LED’s 1,2 &3 will
illuminate when corresponding gate switch is
closed. All other Yellow gate indicators will remain
illuminated. Top two green LED’s illuminated
4 Gate Operation—Yellow LED’s 1,2,3 & 4 will
illuminate when corresponding gate switch is
closed. All three Green LED’s illuminated
= LED off = GREEN LED on = LED on when activated by guard closing
= YELLOW LED on
for K1 & K2 if monitoring required.
CONTROL CONTACTS: Two sets of positively guided N/O safety contacts on terminals, 13,14; and 23,24 (rating 4 Amps).
One auxiliary N/C contact, (31-32). External fusing is recommended.
EMERGENCY STOP MONITORING: Dual channel emergency stop buttons and/or mechanical safety switches can be
monitored using the S13/S14 & S23/S24 circuits. If this feature is not used link terminals S13 to S14 and S23 to S24.
OPERATION: When power is applied to the control module, the RED ‘Power Led’ will illuminate. The GREEN ‘De-select’
indicators will show how many guard switch inputs are activated. NOTE: The number of inputs selected must match the
number of guard switches, more or less and the control unit will not operate. The YELLOW ‘Guard status’ indicators will be
illuminated if the guard is closed or be permanently on if the guard is de-selected.
If all the monitored machine guards are closed, the EMERGENCY STOP buttons (when used) are re-set and the RE-SET
button is pressed and released (Manual Re-set Option), the control relays will energize closing the normally open safety
contacts on terminals 13,14 / 23,24 and the normally closed auxiliary contact 31 & 32 will open. The GREEN Run LED will
illuminate. If set to automatic re-set ( I.e. link in X1 & X2) the control relays will energize when all active guards are closed and
the emergency stop button(s) are re-set. Faults on the safety switch cables, either open or short circuit will be detected
immediately causing the control relays to de-energize.
RUN
POWER
GATE 4GATE 3
4
3
2
1
GATE 4
GATE 3
GATE 2
DE-SELECT
A1 S13 S23 X1 BL DR BL DR 31 13 23
A2 S14 S24 X2 BL DR BL DR 32 14 24
GATE 2GATE 1
GS3 GS4
GS1GS2
K1 K2
MECHANICAL
SAFETY
SWITCHES
or
EMERGENCY
STOP
K1
K2
MANUAL
RE-SET
L (+ve)
N (-ve)
K1
K2
F1 F2
POWER SUPPLY:
24Vac/dc ; 110Vac or 230Vac
POWER SUPPLY FUSING:
Internal resetable fuse with 2 second delay after fault removal.
INDICATION:
RED - Power On, GREEN - Run, YELLOW - Guard Status,
GREEN - Guard Selected status.
GUARD SELECTION:
See CM-S41 switch table.
RE-SET & MONITORING:
The X1, X2 circuit is for reset buttons and/or monitoring
external contactors.
Manual Reset: (see table) A normally open momentary push button
should be placed across X1 & X2. The push button must be pressed
and released as it is monitored for short circuit faults.
Automatic Reset: Link X1, X2 and the system will reset when all
active guards are closed.
Monitor External Contactors: (K1 & K2) Place a normally closed
contact off each contactor in series with X1 & X2 (with or without a
reset button as required) If either K1 or K2 welds during operation, the
other contactor will operate correctly and on the next demand on the
safety system the X1 X2 circuit will prevent a restart. Use PGC relays

CM-S21 CONNECTIONS
POWER SUPPLY:
24Vac/dc
POWER SUPPLY FUSING:
Internal resetable fuse with 2 second delay after fault removal.
INDICATION:
RED - Power On, GREEN - Run, YELLOW - Guard Status.
GUARD SELECTION:
See CM-S21 Guard selection chart.
RE-SET & MONITORING:
The X1, X2 circuit is for reset buttons and/or monitoring external
contactors.
Manual Reset: (see table) A normally open momentary push button should
be placed across X1 & X2. The push button must be pressed and released
as it is monitored for short circuit faults.
Automatic Reset: Link X1, X2 and the system will reset when all active
guards are closed.
Monitor External Contactors: (K1 & K2) Place a normally closed contact
off each contactor in series with X1 & X2 (with or without a reset button as
required) If either K1 or K2 welds during operation, the other contactor will
operate correctly and on the next demand on the safety system the X1 X2
circuit will prevent a restart. Use PGC relays for K1 & K2 if monitoring
CM-S21 RESET AND MONITORING
SWITCH
Reset
Switch
Position
Operation
Automatic Reset
Link required between
terminal X1 & X2. ISIS-2 will
reset when all active guards
are closed.
Manual / Monitored Reset
Requires a reset button in
the X1—X2 connection. The
system will reset when all
guards are closed and the
re-set button is pressed and
released. The reset button is
monitored for faults.
CM-S21 GUARD SELECTOR SWITCH
& INDICATION
Gate
Indication
Yellow
Gate
Selector
Switch
Operation
1 Gate Operation—Yellow
LED No. 1 will illuminate
when gate switch 1 is
closed. Yellow LED No. 2
will remain illuminated.
2 Gate Operation—Yellow
LED’s 1 & 2 will illuminate
when corresponding gate
switch is closed.
= LED on = LED on when activated
by guard closing.
IMPORTANT
On all CM-S safety control
units use the guard inputs
in sequence.
Always set the control unit
guard selector switch to
match the number of safety
switches used.
Any other setting may
cause improper operation.
GATE 2
A1 X1 BL DR 31 13 23
A2 X2 BL DR 32 14 24
GATE 1
GS2
GS1
K1 K2
K1
K2
24V
(+ve)
0V
(-ve)
K1
K2
F1 F2
POWER
IND 1
IND 2
RUN
MANUAL
RE-SET
required.
CONTROL CONTACTS:
Two sets of positively guided N/O safety contacts on terminals, 13,14; and 23,24 (rating 4 Amps). One auxiliary N/C contact,
(31-32). External fusing is recommended.
OPERATION:
When power is applied to the control module, the RED ‘Power Led’ will illuminate. The number of inputs selected must match
the number of guard switches, more or less and the control unit will not operate. The YELLOW ‘Guard status’ indicators will be
illuminated if the guard is closed or be permanently on if the guard is de-selected.
If all the monitored machine guards are closed and the RE-SET button is pressed and released (Manual Re-set Option), the
control relays will energize closing the normally open safety contacts on terminals 13,14 / 23,24 and the normally closed
auxiliary contact 31 & 32 will open. The GREEN Run LED will illuminate.
If set to automatic re-set ( I.e. link in X1 & X2) the control relays will energize when all active guards are closed and the
emergency stop button(s) are re-set. Faults on the safety switch cables, either open or short circuit will be detected
immediately causing the control relays to de-energize.

CM-SE GUARD SELECTOR SWITCH & INDICATION
Guard
Indication
(Yellow)
Channel
Selector
Switch
Operation
1 Gate Operation—Yellow LED
No. 1 will illuminate when gate
switch 1 is closed. All others gate
indicators remain illuminated.
2 Gate Operation—Yellow LED’s
1&2 will illuminate when
corresponding gate switch is
closed. IND 3, 4 & 5 remain
illuminated.
3 Gate Operation—Yellow LED’s
1,2 &3 will illuminate
corresponding gate switch is
closed. IND 4 & 5 remain
illuminated.
4 Gate Operation—Yellow LED’s
1,2,3 & 4 will illuminate when
corresponding gate switch is
closed. IND 5 remains illuminated.
5 Gate Operation—Yellow LED’s
1,2,3,4 & 5 will illuminate when
corresponding gate switch is
closed.
=LED On =LED activated by guard closing
12 GATE SYSTEM
with E-STOP Control
CM-S41
Set to 4 gate operation
1st CM-SE
Set to 5 gate operation
2nd CM-SE
Set to 5 gate operation
10 GATE SYSTEM
CM-S21
Set to 2 gate operation
1st CM-SE
Set to 5 gate operation
2nd CM-SE
Set to 5 gate operation
6 GATE SYSTEM with
E-STOP Control
CM-S41
Set to 4 gate operation
CM-SE
Set to 3 gate operation
SYSTEM EXAMPLES WITH EXTENDER MODULES
CM-SE
CM-SE CONNECTIONS
OPERATION :
When power is applied to the control module, the RED ‘Power Led’ will illuminate. The number of inputs selected must match
the number of guard switches, more or less and the control unit will not operate. The YELLOW ‘Guard status’ indicators will be
illuminated if the guard is closed or be permanently on if the guard is de-selected.
If all the monitored machine guards are closed and the RE-SET button is pressed and released on the main control unit, the
control relays will energize and the normally open safety contacts on terminals 13,14 / 23,24 (main control unit) will close. The
normally closed auxiliary contact 31 & 32 (main control unit) will open. If set to automatic re-set ( i.e. link in X1 & X2) the
control relays will energize when all active guards are closed and the emergency stop button(s) (if connected) are re-set.
Faults on the safety switch cables, either open or short circuit will be detected immediately causing the control relays to de-
energize.
A1 BLDR
GATE 1
GS1
24 V
+ve
0 V
-ve
BLDR BLDR
GATE 2 GATE 3
GS2 GS3
A2 BLDR
GATE 4
GS4
BLDR BLDR
GATE 5 BUS
GS5
IND 1
IND 2
IND 3
IND 4
IND 5
2-WIRE BUS CONNECTION
POWER
BL DRA2
A1
ISIS-4 or ISIS-2
CONTROL UNIT
Connect the ISIS-E
Bus connection to
an active gate input.
Extender Module Control Unit
CM-S41 / CM-S21 Control
Units:
Connect the CM-SE Bus
connection to an active
gate input.
POWER SUPPLY :
24Vac/dc
POWER SUPPLY FUSING :
Internal resetable fuse with 2 second delay after
fault removal.
INDICATION :
RED - Power On.
YELLOW - guard status indicators.
GUARD SELECTION :
See CM-SE Guard selection chart.
CONNECTION TO MAIN CONTROL UNIT:
The CM-SE can be connected to any active guard
switch input on an CM-S21 or CM-S41.
Connect the 2-wire BUS ( BL DR ) terminals on the
CM-SE module to any activated guard input on the
main control module. (Max distance 100 metres)
For larger systems further CM-SE extender
modules can be connected to active guard switch
inputs on an CM-SE extender module.
CM-SE CM-S41
CM-SE CM-S41
CM-SE CM-SE CM-S21

Dimensions
CM-S41
(mm / inches)
W 75 / 2.95
H 74 / 2.91
D 119 / 4.68
Information only
Dimensions
CM-S21 & CM-SE
(mm / inches)
W 22.5 / 0.88
H 84 / 3.3
D 119 / 4.68
Information only
Dimensions
CM-S11
(mm / inches)
CM-S31
(mm / inches)
H 28 / 1.1 29 / 1.14
W 52 / 2.04 53 / 2.08
D 14 / 0.55 13.5 / 0.53
D1 3 / 0.11 3 / 0.11
A 22 / 0.86 22 / 0.86
B1 4.2 / 0.16 dia. 4.2 / 0.16 dia.
B2 8.1 / 0.32 dia. 8.1 / 0.32 dia
C 6.4 / 0.25 6.4 / 0.25
Information only
DIMENSIONS
CM-S41 (all voltages)
CM-S21 / CM-SE
CM-SERIES SAFETY SWITCHES

TECHNICAL INFORMATION
SPECIFICATIONS CONTROL UNITS SAFETY SWITCHES
CM-S41 CM-S21 CM-SE CM-S11 CM-S31
Supply nominal voltage 24Vac/dc
110 or 230Vac 24Vac/dc 24Vac/dc - -
Nominal power consumption 6VA 3VA 3VA - -
Safety contacts 2 x N/O - - -
Auxiliary contact 1 x N/C - - -
Output contact rating (max) 4A/230Vac; 2A/24Vdc(Res.)@Cos=1 - - -
Output contact rating (min) 10V/10mA - - -
Output contact fuse rating AC=5A; DC=2.5A; Quick blow - - -
Drop out time Deactivation by sensor 13ms - -
Nominal voltage across BL/DR
sensor ON: 4V; OFF 0 to 10Vdc
Internal fuse 500mA Resetable - -
Internal fuse recovery time >2 Seconds - -
Internal switches Active gate selector; Manual or
Monitored reset selection
Active gate
selector - -
Max conductor size 1 x 2.5mm stranded with sleeves, 1 x 4mm solid - -
Installation group (Control unit) C in accordance with VDE0110 - -
Contamination level
Vibration resistance Amplitude 2mm, frequency 10 to 55 Hz -
Enclosure protection Housing IP40, Terminals IP20 IP67
Switching distance - - - 5-7mm ON; 8-12mm OFF
Minimum gap 1mm
Cable length 3 or 5 metres (Max 100 metres)
Operating temperature -10C to +55C (85% Humidity max) -10C to +55C
Storage temperature -20C to +60C -20C to +60C
Housing material Polycarbonate Red ABS Red 316 Stainless
Steel
Mounting / Fixing 35mm Symmetric DIN Rail 22mm Centres;
M4 security screws supplied
Weight (AC/DC) (3m/5m) 575g max. 183g 135g 207g max 265g
Dimensions See page 7
III
OMRON SCIENTIFIC TECHNOLOGIES, INC.
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E-mail: [email protected]
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